Clay @ This word is used of sediment found in pits or in streets Isaiah:57:20; Jeremiah:38:60), of dust mixed with spittle John:9:6), and of potter's clay Isaiah:41:25; Nahum:3:14; Jeremiah:18:1-6; Romans:9:21). Clay was used for sealing Job:38:14; Jeremiah:32:14). Our Lord's tomb may have been thus sealed Matthew:27:66). The practice of sealing doors with clay is still common in the East. Clay was also in primitive times used for mortar Genesis:11:3). The "clay ground" in which the large vessels of the temple were cast (kjvKings:7:46; 2Chronicals:4:17) was a compact loam fitted for the purpose. The expression literally rendered is, "in the thickness of the ground,", meaning, "in stiff ground" or in clay.